Wildcard should be triggered when upper ns is triggered

[avetisk]

This won't work:

var ee = new EventEmitter();

ee.on('ns.*', function () {
  console.log('EPIC WIN');
});
ee.emit('ns');

Nothing will be logged.

This should be available at least as an option:

var ee = new EventEmitter({widewildcard': true});

ee.on('ns.*', function () {
  console.log('EPIC WIN');
});
ee.emit('ns'); //-> EPIC WIN